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Method of providing shared objects and node-specific objects in a cluster file system

a file system and shared object technology, applied in the field of cluster file systems, can solve the problem that most cluster file systems do not provide the capability for node-specific objects such as files and directories

Active Publication Date: 2005-09-29
ORACLE INT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cluster file systems provide shared objects (e.g., a file or a directory) across the nodes, most cluster file systems do not provide the capability for node-specific objects such as files and directories.

Method used

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  • Method of providing shared objects and node-specific objects in a cluster file system
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  • Method of providing shared objects and node-specific objects in a cluster file system

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Embodiment Construction

[0011] Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with these embodiments, it will be understood that they are not intended to limit the invention to these embodiments. On the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention.

[0012] In a current implementation of a cluster file system, shared objects (e.g., files and directories) and node-specific objects (e.g., files and directories) are provided. In particular, there is no need to duplicate shared objects in a node-specific directory, which converts the statu...

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Abstract

A method of providing shared objects and node-specific objects in a cluster file system is described and provided. The method includes providing to a particular shared object an attribute, whereas the particular shared object can be a container-type shared object. The attribute indicates any object created in the particular shared object (including its sub-divisions or sub-containers) from this point in time will be designated as node-specific. Furthermore, when a node causes a file system operation that is node-specific to be performed by accessing the particular shared object, the file system operation is performed in an alternate directory corresponding to the node. The alternate directory supports a node-specific object. The shared objects and the node-specific objects can be directories. Additionally, the shared objects and the node-specific objects can be files.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention generally relates to cluster file systems. More particularly, the present invention relates to providing shared objects and node-specific objects in a cluster file system. [0003] 2. Related Art [0004] Generally, a cluster file system is a shared file system. The cluster file system makes files visible to and accessible by the nodes in a cluster. Each node has the same view. It does not matter whether a file is stored on a device connected to all the nodes or on a device that is private to a single node. By maintaining cache coherency across the nodes, the cluster file system assures that all nodes at all times have the same view of the files in the cluster. [0005] Although cluster file systems provide shared objects (e.g., a file or a directory) across the nodes, most cluster file systems do not provide the capability for node-specific objects such as files and directories. Some cluster file sy...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G06F7/00G06F17/30
CPCG06F17/30067G06F16/10
Inventor KAURA, SUCHITGOYAL, NEERAJ
Owner ORACLE INT CORP
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